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EP1047059A1 - Kassettenwechsler - Google Patents

Kassettenwechsler Download PDF

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Publication number
EP1047059A1
EP1047059A1 EP98961652A EP98961652A EP1047059A1 EP 1047059 A1 EP1047059 A1 EP 1047059A1 EP 98961652 A EP98961652 A EP 98961652A EP 98961652 A EP98961652 A EP 98961652A EP 1047059 A1 EP1047059 A1 EP 1047059A1
Authority
EP
European Patent Office
Prior art keywords
stocker
cassette
cassettes
recording
transfer device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98961652A
Other languages
English (en)
French (fr)
Other versions
EP1047059A4 (de
Inventor
Kenji Sasaki
Tetsuya Morita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP10003015A external-priority patent/JPH11203754A/ja
Priority claimed from JP10083379A external-priority patent/JPH11283302A/ja
Priority claimed from JP10258282A external-priority patent/JP2000090525A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP1047059A1 publication Critical patent/EP1047059A1/de
Publication of EP1047059A4 publication Critical patent/EP1047059A4/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/22—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from random access magazine of disc records
    • G11B17/225—Guiding record carriers not specifically of filamentary or web form, or of supports therefor from random access magazine of disc records wherein the disks are transferred from a fixed magazine to a fixed playing unit using a moving carriage
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
    • G11B15/68—Automatic cassette changing arrangements; automatic tape changing arrangements
    • G11B15/682—Automatic cassette changing arrangements; automatic tape changing arrangements with fixed magazines having fixed cassette storage cells, e.g. in racks
    • G11B15/6835—Automatic cassette changing arrangements; automatic tape changing arrangements with fixed magazines having fixed cassette storage cells, e.g. in racks the cassettes being transferred to a fixed recorder or player using a moving carriage
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
    • G11B15/68—Automatic cassette changing arrangements; automatic tape changing arrangements
    • G11B15/6845—Automatic cassette changing arrangements; automatic tape changing arrangements with rotatable magazine
    • G11B15/687—Automatic cassette changing arrangements; automatic tape changing arrangements with rotatable magazine the cassettes being arranged in multiple levels
    • G11B15/688—Automatic cassette changing arrangements; automatic tape changing arrangements with rotatable magazine the cassettes being arranged in multiple levels the cassettes being transferred to a fixed recorder or player using a moving carriage

Definitions

  • the present invention relates to a cassette changer capable of storing a plurality of tape cassettes for a VCR or the like and sequentially operating these cassettes.
  • Cassette changers that store a plurality of cassettes and transfer these cassettes to a recording/reproducing device in an arbitrary order for recording or reproduction are applied to practical use chiefly in broadcasting stations or in computers for data recording.
  • Cassette changers for broadcasting stations are called "cart machines" and are expensive and large enough to each store several hundreds of cassettes.
  • Small-sized cassette changers that each store several cassettes to record data in a computer are also put to practical use.
  • This known cassette changer has a recording/reproducing device for recording signals to a cassette including a tape-state recording medium and for reproducing the signals recorded in the cassette.
  • a turntable is provided above the recording/reproducing device and can be rotated through 180 degrees around a rotating shaft extending in a vertical direction of the turntable.
  • a first stocker and a second stocker are disposed for rotation integral with the turntable and at 180 degrees from each other with respect to the rotating shaft of the turntable.
  • Each of the stockers can store a plurality of cassettes in the vertical direction.
  • a transfer device which can move between the recording/reproducing device and the stockers in the vertical direction.
  • This transfer device can transfer cassettes between the recording/reproducing device and one of the stockers which is located correspondently to the transfer device by means of rotation of the turntable. Specifically, the transfer device picks up one of the cassettes stored in the stocker, withdraws it thereinto, moves downward with the cassette held therein so as to face an insertion and withdrawal opening in the recording/reproducing device, and ejects the held cassette to the insertion and withdrawal port.
  • the transfer device can remove a cassette from the insertion and withdrawal opening of the recording/reproducing device, and then transfer it to the stocker.
  • cassette changers basic operations of cassette changers are performed, that is, an arbitrary cassette accommodated in one of the stockers is transferred to the recording/reproducing device and a cassette for which recording or reproduction has been completed is transferred to a desired position in one of the stockers.
  • a cassette changer according to the present invention comprises:
  • the push-in member can push the cassette into the stocker in response to a moving operation of the transfer device, which is one of the basic operations of the cassette changer. Consequently, required mechanisms can be simplified, and malfunction can be prevented, that is, the cassette is prevented from disturbing the movement of the transfer device.
  • reference numeral 10 denotes a recording/reproducing device for recording signals in a cassette 11 and reproducing signals from the cassette 11.
  • the recording/reproducing device 10 has an insertion and withdrawal opening 12 in a front surface thereof. The insertion and withdrawal opening 12 is used to insert and withdraw the cassette 11 into and from the recording/reproducing device 10.
  • a turntable 13 is provided above the recording/reproducing device 10. Since the turntable 13, as shown in FIG. 2 has a gear 14 formed in an outer peripheral portion thereof, it can be rotated around a rotating shaft 15 through 180 degrees by means of a rotative-drive mechanism, described later.
  • a first stocker 16 and a second stocker 17 are disposed back to back on the turntable 13, that is, at 180 degrees from each other with respect to the rotating shaft 15.
  • the first stocker 16 and the second stocker 17 are configured to store sixteen cassettes 11 in lamination along a vertical direction. As shown in FIG. 1, each of the cassettes 11 is stored in the stocker 16, 17 in a manner such that its end projects from the stocker 16, 17.
  • a disc-shaped upper cam 18 is mounted on top surfaces of the first and second stockers 16, 17.
  • a rotation unit 19 comprises the turntable 13, the first stocker 16, the second stocker 17 and the upper cam 18.
  • the first stocker 16 is located at a front position corresponding to the insertion and withdrawal opening 12 of the recording/reproducing device 10 and the second stocker 17 is located at a rear position opposite the front position.
  • a transfer device 20 is disposed to elevate and lower along a rack 21 in the vertical direction, for transferring the cassette 11 between the stocker located at the front position and the recording/reproducing device 10.
  • the transfer device 20 has a vertical-drive device (not shown in FIG. 1) including a pinion that meshes with the rack 21 to move the transfer device 20 in the vertical direction, and a horizontal-drive device (not shown) for withdrawing the cassette 11 into the transfer device 20 from the stocker 16, 17 or the insertion and withdrawal opening 12 of the recording/reproducing device 10 and ejecting the cassette 11 in the transfer device 20 to the stocker 16, 17 or the insertion and withdrawal opening 12 of the recording/reproducing device 10.
  • the transfer device 20 has a push-in member 23 on a top surface of a central portion thereof.
  • the push-in member 23 has a cam 24 and an elastic roller 25.
  • the cam 24 has a cam surface 26 inclined so that the cam surface 26 is linearly closer to the cassettes 11 in the stocker 16, 17 from highest position to lowest position.
  • the elastic roller 25 is formed of an elastic member, for example, rubber and rotatably supported by a roller shaft 27 extending in a horizontal direction. The elastic roller 25 projects forward from a tip portion 28 of the cam surface 26 by a distance K.
  • the cassette changer has a cassette presser 31.
  • the cassette presser 31 has a vertical presser section 32 and horizontal arms 33, 34 extending from an upper and a lower ends of the presser section 32, the vertical presser section 32 and the horizontal arms 33, 34 being integrated with one another.
  • the arms 33, 34 centrally have shafts 35, 36, respectively, extending along the same vertical axis so that the cassette presser 32 can pivot in the horizontal direction around the shafts 35, 36.
  • the arms 33, 34 each have a cam follower pin 37, 38, respectively, at a tip thereof.
  • the upper cam 18 has a cam groove 39 formed therein and in which the upper cam follower pin 37 is fitted from upside.
  • the turntable 13 has a cam groove 40 formed therein and in which the lower cam follower pin 38 is fitted from downside.
  • a rotative-drive mechanism 41 for rotating the turntable 13 comprises a relay gear 42 that meshes with the gear 14 of the turntable 13 shown in FIG. 2, a second relay gear 43 for rotating the first relay gear 42, and a worm 45 rotated by a motor 44 to drive a worm wheel (not shown) that integrally rotates with the second relay gear 43.
  • the cassette 11 stored in the sixth stage from the top of the first stocker 16 is transferred to the recording/reproducing device 10 as follows:
  • the transfer device 20 moves along the rack 21 up to the height at which this cassette 11 is stored, and then withdraws the cassette 11 thereinto.
  • the transfer device 20 lowers down to the insertion and withdrawal opening 12 of the recording/reproducing device 10.
  • the transfer device 20 then ejects the cassette 11 that is withdrawn inside, to the insertion and withdrawal opening 12. This operation causes the cassette 11 to be fed into the recording/reproducing device 10 from the insertion and withdrawal opening 12 for recording or reproduction.
  • a movement path followed by the cassette 11 is shown by references A, B, and C in FIG. 1.
  • the rotation unit 19 is rotated by the rotative-drive mechanism 41 to move the second stocker 17 forward.
  • the cassette changer is subjected to external vibration or impact to cause the cassette 11 stored in the first or second stocker 16 or 17 to shift and project from its specified storing position as shown in FIG. 4.
  • the following operation is performed after the transfer device 20 has passed by the projecting cassette 11:
  • FIG. 5 shows that the cassette 11 has been pushed into the stocker 16, 17 so as not to disturb the movement of the transfer device 20.
  • the cassette 11 projects and shifts from the specified storing position to a position where it obstructs the movement of the transfer device 20, it can be pushed into the stocker 16, 17 in response to the movement of the transfer device 20, which is a basic operation of the cassette changer. Consequently, required mechanisms can be simplified, and malfunction can be prevented, that is, the cassette 11 is prevented from disturbing the movement of the transfer device 20.
  • the elastic roller 25 comes in contact with the cassette 11, noise is prevented during the contact because the elastic roller 25 is formed of an elastomer. Further, since the elastic roller 25 rotates while moving in contact with the cassette 11, moving loads on the transfer device 20 are reduced during the contact.
  • the rotation unit 19 is stopped in a position where the first stocker 16 is opposed to the transfer device 20.
  • the cassette presser 31 prevents the cassettes 11 stored in the second stocker 17 from projecting from their specified positions because the presser section 32 pushes all the cassettes 11 stored in the second stocker 17 by following the shape of the cam groove 39, 49 in which the cam follower pin 37, 38 is fitted.
  • the rotation unit 19 is rotated around the rotating shaft 15 through 180 degrees in a direction S by means of the rotative-drive mechanism 41 shown in FIG. 6, the cam grooves 39, 40 also rotate integrally. Then, the cam follower pins 37, 38 move along the cam grooves 39, 40, respectively, consequently the cassette presser 31 rotates around the shafts 35, 36, and as shown in FIG. 9, the presser section 32 leaves the cassettes 11.
  • a circle D represents an outermost rotational trace of the cassettes 11 stored in the first stocker 16 and the second stocker 17.
  • the presser section 32 of the cassette presser 31 is located outside the circle D and thus does not hinder the rotative movement of the rotation unit 19.
  • FIG. 10 shows that the rotation unit 19 is further rotated from the state shown in FIG. 9, that is, through 180 degrees from the state shown in FIG. 8.
  • the cam follower pin 37, 38 fitted in the cam groove 39, 40 respectively, moves to rotate the cassette presser 31 around the shaft 35, 36 to allow the presser section 32 to push into the first stocker 16 located at the rear position, the all the cassettes 11 stored therein.
  • all the cassettes 11 stored in the first stocker 16 are precluded from projecting from their specified positions.
  • the cassette presser 31 prevents the cassettes 11 in the first or second stocker 16 or 17 located at the rear position from protruding from their specified storing positions while the rotation unit 19 is stopped. In addition, while the rotation unit 19 is rotating, the cassette presser 31 moves to a position where it does not hinder the movement of the rotation unit 19.
  • the upper cam 18 and the turntable 13 which is located on the lower side have the cam grooves 39, 40, respectively, formed therein, and the cam follower pins 37, 38 perform the same operation both on the upper and lower sides. This configuration prevents the cassette presser 31, which is elongated in the vertical direction, from being twisted.
  • the cassette presser 31 is moved using power associated with the rotation of the rotation unit 19. This eliminates the needs for a new drive mechanism to simplify the mechanisms.
  • the present invention is not limited to this, but another drive mechanism can be employed.
  • a straight line Dx is a center line in a width direction of the recording/reproducing device 10.
  • a straight line Ds passes through a central point of the insertion and withdrawal opening 12 in the width direction, and is parallel with the straight line Dx and separate therefrom by a distance d.
  • the first stocker 16 and the second stocker 17 are configured to store seven cassettes along the vertical direction as shown in FIG. 13.
  • the first stocker 16 shown in FIG. 13 has two side walls 51, 51 for regulating the width direction of the tape cassettes 11 and eight partitioning plates for regulating a thickness direction of tape cassettes 11 and has seven storing shelves.
  • the side walls 51 project forward from the partitioning plates 52.
  • the second stocker 17 has a similar configuration.
  • a central point of the rotating shaft 15 of the turntable 13 is located on the straight line Dx, which is the center line of the recording/reproducing device 10 in the width direction.
  • the first stocker 16 is located on the turntable 13 at a position where when the turntable 13 rotates until the stocker 16 is opposed to the transfer device 20, the width-wise central point of the tape cassettes 11 stored in this stocker 16 rests on the straight line Ds, which passes through the central point of the insertion and withdrawal opening 12 in the width direction.
  • the second stocker 17 is similarly located where it is opposed to the transfer device 20, the width-wise central point of the tape cassettes 11 stored in this stocker 17 rests on the straight line Ds.
  • the first stocker 16 and the second stocker 17 are located on the turntable 13 and offset from each other in the width direction.
  • the transfer device 20 is similarly located so as to have its width-wise center on the straight line Ds in order to withdraw the tape cassettes 11 having their central point on the straight line Ds and to eject these cassettes 11 to the first stocker and the second stocker.
  • the first stocker 16 and the second stocker 17, which are located on the turntable 13 as described above, are configured so that the side walls 51 of the second stocker 17 regulate the depth of the tape cassettes 11 stored in the first stocker 16 as shown in FIG. 14, whereas the side walls 51 of the first stocker 16 regulate the depth direction of the tape cassettes 11 stored in the second stocker 17.
  • FIGS. 16 and 17 shows another cassette changer without the configuration of the present invention to explain the advantages of the cassette changer according to the present invention.
  • the cassette changer in FIGS. 16 and 17 differs from the cassette changer according to the present invention shown in FIGS. 11 to 14 in terms of the configuration and arrangement of the stockers.
  • the first stocker 16 and the second stocker 17 are not located offset from each other in the width direction as in the cassette changer according to the present invention, but the first stocker 16 and the second stocker 17 share the same center line, that is, the center line of the cassettes 11 stored in the first stocker 16 is the same as that of the cassettes 11 stored in the second stocker 17.
  • This center line is located on the straight line Dc correspondently to the eccentrically disposed insertion and withdrawal opening 12.
  • the central point of the rotating shaft 15 of the turntable 13 is located on the straight line Ds, which is separate from the straight line Dx by the distance d, wherein the straight line Dx is the center line of the recording/reproducing device 10.
  • the cassette 11 rotates in such a manner as to trace a circle E during the rotation of the turntable 13.
  • the circle E protrudes out from a specified width of the recording/reproducing device 10.
  • the cassette changer must be enlarged in the width direction in order to cover this protruding portion.
  • the width-wise central point of the cassettes 11 in, for example, the first stocker 16, which is located in front of the transfer device 20, is located on the straight line Ds , which is separate from the straight line Dx by the distance d, as described above, and the width-wise central point of the tape cassettes 11 in the opposite second stocker 17 is located separately from the straight line Dx toward the opposite side of the straight line Ds by the distance d.
  • the central point of the rotating shaft 15 of the turntable 13 is disposed on the straight line Dx. In this configuration, when the turntable 13 rotates through 180 degrees, the center line of the cassettes 11 moved to the front of the transfer device 20 rests on the straight line Ds. In the cassette changer configured as described above, the cassettes 11 rotates in a fashion tracing a circle F, shown in FIG. 11.
  • FIG. 15 schematically shows the relationship between the circle F in FIG. 11, which is based on the present invention, and the circle E in FIG. 16, which is not based on the present invention.
  • a straight line Dy crosses the straight lines Dx and Ds and passes through a point OE that is a central point of the circle E and through a point OF that is a central point of the circle F.
  • the radius of the circle E is a straight line RE joining the point OE with a point H that is a corner of the tape cassette 11, and the radius of the circle F is a straight line RF joining the point OF with the point H.
  • the straight line RF is longer than the straight line RE.
  • the circle E and the circle F cross each other at the point H.
  • the circle F is located outside the circle E but opposite to the eccentric direction of the insertion and withdrawal opening 12 of the recording/reproducing device 10. Accordingly, there is an extra space in a casing of the cassette changer, thereby eliminating the need to increase the size of the cassette changer.
  • the side walls 51 of the second stocker 17 regulate the depth direction of the tape cassettes 11 stored in the first stocker 16, whereas the side walls 51 of the first stocker 16 regulate the depth direction of the tape cassettes 11 stored in the second stocker 17, as shown in FIGS. 13 and 14. Accordingly, no member needs to be provided between the opposed cassette tapes 11, for regulating the positions of these tape cassettes 11 in the depth direction, thereby enabling the interval between the opposed tape cassettes 11 to be reduced. Consequently, the diameter of the circle F shown in FIGS. 11 and 15 can be reduced.
  • FIG. 18 illustrates a cassette changer with the first stocker 16 and the second stocker 17 located on the turntable 13 and offset from each other in the width direction, the cassette changer comprising the push-in member 23 and the cassette presser 31 as in the cassette changer shown in FIGS. 1 to 10.
  • the recording/reproducing device 10 and a cassette replacement device 62 are replaceably mounted on and above a base 61 at predetermined positions.
  • the cassette replacement device 62 comprises a stocker 63 that stores a plurality of cassettes 11, and the transfer device 20.
  • the stocker 63 is not the pair of rotary stockers arranged on the turntable 13 and shown in FIGS. 1 to 18, but a single fixed stocker.
  • the transfer device 20 elevates and lowers between a first position P corresponding to the insertion and withdrawal opening 12 of the recording/reproducing device 10 and a second position Q corresponding to the stocker 63.
  • the transfer device 20 comprises an optical sensor 65 including a sensor section 64 and an initial plate 67 including a folded portion 66.
  • the optical sensor 65 outputs different electric signals depending on the presence of an obstacle at the sensor section 64.
  • the initial plate 67 is mounted on the transfer device 20 so that its vertical position can be adjusted using, for example, a slot formed therein and through which mounting screws pass.
  • the cassette replacement device 62 comprises a counter plate 68 disposed correspondently to the sensor section 64 of the optical sensor 65.
  • the counter plate 68 includes a plurality of slits 69 disposed correspondently to the positions of the cassettes 11 stored in the stocker 63.
  • the cassette replacement device 62 comprises an optical sensor 71 having a sensor section 70.
  • the optical sensor 71 outputs different electric signals depending on the presence of an obstacle at the sensor section 70.
  • the optical sensor 71 is located so that when the transfer device 20 moves downward to the height of the insertion and withdrawal opening 12 of the recording/reproducing device 10, the folded portion 66 of the initial plate 67 obstructs the sensor section 70.
  • the transfer device 20 comprises a pinion 73 meshing with the rack 21, a worm 75 meshing with a worm wheel 74 that rotates integrally with the pinion 73, and a motor 76 for driving the worm 75.
  • the motor 76 rotates to move the transfer device 20 in the vertical direction.
  • the sensor section 64 of the optical sensor 65 moves along the counter plate 68 to measure the slits 69 formed in the counter plate 68. Based on a result of the measurement, the transfer device 20 stops at a height corresponding to the specified cassette 11.
  • the transfer device 20 withdraws the cassette 11 from the stocker 63, holds it, and then moves downward while holding it.
  • the transfer device 20 stops when the initial plate 67 obstructs the sensor section 70 of the optical sensor 71.
  • the height of the cassette 11 equals that of the insertion and withdrawal opening 12 of the recording/reproducing device 10.
  • the transfer device 20 carries the held cassette 11 to the insertion and withdrawal opening 12 of the recording/reproducing device 10 for installation.
  • the recording/reproducing device 10 and the cassette replacement device 62 are positioned and fixed to the base 1.
  • jigs are used for the fixation so that a predetermined locational relationship is established between the insertion and withdrawal opening 12 of the recording/reproducing device 10 and the transfer device 20 of the cassette transfer device 62.
  • the recording/reproducing device 10 may be replaced with one with the insertion and withdrawal opening 12 located at a different height.
  • the transfer device 20 is reliably stopped at the height of the insertion and withdrawal opening 12 of the new recording/reproducing device 10.

Landscapes

  • Automatic Tape Cassette Changers (AREA)
EP98961652A 1998-01-09 1998-12-28 Kassettenwechsler Withdrawn EP1047059A4 (de)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
JP10003015A JPH11203754A (ja) 1998-01-09 1998-01-09 カセットチェンジャー
JP301598 1998-01-09
JP8337998 1998-03-30
JP10083379A JPH11283302A (ja) 1998-03-30 1998-03-30 オートチェンジャー及び記録システム
JP10258282A JP2000090525A (ja) 1998-09-11 1998-09-11 カセットチェンジャー
JP25828298 1998-09-11
PCT/JP1998/006015 WO1999035646A1 (fr) 1998-01-09 1998-12-28 Changeur de cassettes

Publications (2)

Publication Number Publication Date
EP1047059A1 true EP1047059A1 (de) 2000-10-25
EP1047059A4 EP1047059A4 (de) 2001-09-19

Family

ID=27275628

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98961652A Withdrawn EP1047059A4 (de) 1998-01-09 1998-12-28 Kassettenwechsler

Country Status (4)

Country Link
US (1) US6574063B1 (de)
EP (1) EP1047059A4 (de)
CN (1) CN1125451C (de)
WO (1) WO1999035646A1 (de)

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CN1811963B (zh) * 2005-01-28 2010-06-16 坦德伯格数据有限公司 数据盒箱及其操作方法
CN1815594B (zh) * 2005-01-31 2010-06-09 坦德伯格数据有限公司 用于数据存储系统的可升级和可扩展装置
US9196290B2 (en) * 2013-01-09 2015-11-24 Fujitsu Limited Library device
JP6515354B2 (ja) 2015-01-30 2019-05-22 パナソニックＩｐマネジメント株式会社 ロボット搬送装置
WO2020126971A1 (en) * 2018-12-21 2020-06-25 Mycronic AB A storage unit for smt supplies

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Also Published As

Publication number Publication date
CN1125451C (zh) 2003-10-22
US6574063B1 (en) 2003-06-03
EP1047059A4 (de) 2001-09-19
WO1999035646A1 (fr) 1999-07-15
CN1285072A (zh) 2001-02-21

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